Improving Diet Assessment in Adolescents

描述（由申请人提供）：饮食摄入量为预防干预计划提供了一些最有价值的见解。随着对青少年超重和肥胖的日益关注，准确测量饮食的需求变得势在必行。对青少年的评估是有问题的，因为这一群体的饮食习惯不规律，他们对记录食物摄入量的热情较低。在青少年中进行的初步研究表明，技术的创新使用可能会提高年轻人饮食信息的准确性。识别移动的设备中的沉浸技术，例如，更高分辨率的图像、改进的存储器容量、更快的处理器允许这些设备处理以前不可能的信息。该项目通过改进和测试青少年的方法，并使用创新方法来改善答卷人的自我报告，从而实现PAR-06-104的几个目标。我们的目标是开发、实施和评估一种移动终端食物记录，它将转化为青少年每日食物和营养摄入的准确记录。我们的第一步包括进一步开发我们的原型移动终端，以包括数字照片，营养数据库和图像处理，用于识别和量化食物消费。移动的计算设备提供了用于收集饮食信息的独特工具，其减少了记录保持者的负担。食物的图片可以用各种输入方法进行标记，这些方法将物品链接起来进行图像处理和分析，以估计食物的量。吃食物前后的照片可以估计食物的消耗量。我们计划招募100名知情同意的六、七、八、九年级学生参加普渡大学校园的夏令营，让他们在受控条件下使用移动终端食物记录，同时食用精确已知成分的膳食，以帮助量化与食物和营养素输出相关的误差。工具的改进将反映在受控环境下使用时发现的错误的反馈和纠正。该项目的最后阶段将使用尿氮、蔗糖和果糖分别作为蛋白质摄入量和糖摄入量的生物标志物，验证103名知情同意的11至17岁自由生活青少年的移动终端食物记录。该工具可用于基于人口和临床的研究，以提高我们对青少年饮食暴露的理解。

DESCRIPTION (provided by applicant): Dietary intake provides some of the most valuable insights for mounting intervention programs for prevention. With the growing concern about adolescent overweight and obesity, the need to accurately measure diet becomes imperative. Assessment among adolescents is problematic as this group has irregular eating patterns and they have less enthusiasm for recording food intake. Preliminary studies among adolescents suggest that innovative use of technology may improve the accuracy of diet information from young people. Recognition of immerging technology in mobile devices, e.g., higher resolution pictures, improved memory capacity, faster processors, allow these devices to process information not previously possible. This project addresses several objectives of PAR-06-104 by refining and testing methods for adolescents and using innovative methods to improve respondent self-report. Our goal is to develop, implement, and evaluate a mobile device food record that will translate to an accurate account of daily food and nutrient intake among adolescents. Our first steps include further development of our prototype mobile device to include digital photographs, a nutrient data base, and image processing for identification and quantification of food consumption. Mobile computing devices provide a unique vehicle for collecting dietary information that reduces burden on record keepers. Pictures of food can be marked with a variety of input methods that link the item for image processing and analysis that estimate the amount of food. Pictures before and after foods are eaten can estimate the amount of food consumed. We plan to recruit a sample of 100 informed and consenting sixth, seventh, eighth, and ninth-graders attending summer camps on the Purdue campus to consume meals of precisely known composition while using the mobile device food record under controlled conditions to aid with quantifying the error associated with the food and nutrient output. Refinements to the tool will reflect the feedback and correction of errors detected with use under the controlled environment. The final phase of the project will validate the mobile device food record among 103 informed and consenting free-living adolescents between 11 and 17 y by using urinary nitrogen and sucrose and fructose as biomarkers of protein intake and sugar intake, respectively. This tool could be used for population and clinical based studies to improve our understanding of dietary exposures among adolescents.